Multilevel Voltage Source Inverter Using Cascaded- Inverters with Separated Dc Sources
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چکیده
1.1 HARMONICS IN ELECTRICAL SYSTEMS ............................................................................................ 1 1.2 CONVENTIONAL TWO-LEVEL AND THREE-LEVEL VOLTAGE SOURCE INVERTER ............................... 2 1.3 MULTILEVEL VOLTAGE SOURCE INVERTER..................................................................................... 5 1.3.1 Diode-Clamped Multilevel Inverter (DCMI) ........................................................................... 6 1.3.2 Flying-capacitor Multilevel Inverter (FCMI) .......................................................................... 8 1.3.3 Multilevel Inverter Using Cascaded-Inverters with Separated DC Sources............................ 9 1.3.4 Comparison among Three Multilevel Inverters in Application Aspects .................................. 11 1.4 MODULATION TOPOLOGIES FOR MULTILEVEL INVERTER ............................................................... 13 1.4.1 Sinusoidal Natural Pulse Width Modulation (SPWM) ........................................................... 14 1.4.2 Selective Harmonic Eliminated Pulse Width Modulation (SHE PWM)................................... 18 1.4.3 Optimized Harmonic Stepped-Waveform Technique (OHSW)................................................ 20 1.5 OBJECTIVE OF THE THESIS ............................................................................................................ 22
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